TY JOUR TI THE CONTENT AND DISTRIBUTION OF HEAVY METALS IN THE BOTTOM SEDIMENTS OF THE IVANKOVO RESERVOIR PLES KW sediments KW heavy metals KW pollution KW mobile forms KW sorption fraction KW i-geo class KW reservoir JO Melioration and Water Management AU Tolkachev, G.Y. AU Ilyina, T.A. AU Abakumova, N.V. AU Rodkina, I.A. PY 2023 IS 2023 PB ANO Editorial Board Melioration and water management